After months of anticipation, Macworld 2009 is finally here. Throughout the four days of the expo (from now until Jan. 9), more than 100 Googlers from several product teams will be available to demonstrate Google software for the Mac and the iPhone.

Picasa for Mac made its debut yesterday, and you can follow along on the Google Mac Blog for more details on what we have in store for the rest of the week.

If you're going to Macworld, we invite you to stop by. And for those of you who can't make it, many of the demos are available via video at google.com/macworld.